Has anyone won a Diminished Value claim in court?

I was rear-ended and the damages were $13,000. Vehicle was repaired and I attempted to negotiate with Farmers Insurance for DV. They stonewalled me. Next I hired a speciality firm to give me a DV claim report, which they claimed would have the insurance company jumping on the phone to call me and settle out of court. They did not, they offered me nothing. Now I have sent a demand letter to the driver for the claim–which is also supposed to get his insurance company jumping on the phone to settle out of court. But what if they don't? If I do go to court, what are my chances? A lawyer told me small claims is great with this stuff, however I find it very strange that googling seems to find no one out there talking about winning DV in court. It seems that you either deal with a good insurance company and they will settle with you immediately, or you struggle against them and get nothing. Farmers even cheated me out a week's car rental, saying the "repair took too long"!
State is California, and this is a "third-party" claim; in other words, the insurance company I am dealing with is not my own, but the perpetrator's.

I worked in claims for Farmers for nearly 10 years and was on the insurance side of this many times. I may be able to offer an inside perspective on this but doubt that it differs from other insurance companies. You should check with your state to be sure a claim like this is valid. Some allow it but cap how old a car you may claim this on (such as only those vehicles 6 model yrs and newer can make the claim). Assuming it is, you're doing exactly what I would do in your situation. The problem is proving it. First, you have to realize the loss by selling or trading the vehicle. Until you do that, your loss is on paper, just like a stock or mutual fund may be. Your loss today would be greater than, say, two years from now. T prove your case is often difficult. A sworn/notarized letter (or simply on dealership letterhead) from one or two local, reputable used car sales mgrs stating the pre and post-accident value may suffice. In person testimony is better. You may luck out in SCC and win with what you have but the burden of proof is on you. You would have to sue the driver of the other car, NOT Farmers. Furthermore, Farmers may bump the matter to circuit court to more formally address the loss and that would force you to decide to rep. yourself or retain counsel. The reasoning for this is SCC is a crapshoot and decisions generally can't be appealed. I've seen people win these and, more often, lose them. We've paid those that presented good support of their loss w/o going to court and resisted others that poorly supported their claim. It's entirely a case by case thing in each state. It rests on the strength of your proof and they won't be jumping on the phone to settle unless you have a well documented loss AND you've sold/traded the car. Check your state's property damage statute of limitations to see how long you have, assemble your documentation, make an appt with the adjustor to meet in person and ask that his supv and/or mrg. be present as well, make a reasonable presentation of monetary demand (usually 10-20% of the vehicle value) in a professional and cordial manner. Ask questions of them as to what you're missing, if anything, to prove this and be prepared to negotiate. A hot-headed demand in the clouds will likely get you the door. You may not get everything you came for and they may pay more than they'd like but that's usually a sign of a good settlement (if they're willing to pay at all). Your last resort is to sue in SCC. Good luck, my friend.